A personal home page can be used to publish data about yourself, such as:

who you are, what you do, what you like or dislike

your phone number, email address or other contact information

a photo of yourself

You also can use a personal home page to store information for yourself (and maybe also for others), such as:

your favourite links

your todo list

your notes

Keep in mind that a personal home page is usually public, anyone can read and edit it (and this is a good thing, see it as a means of communication with you). However, you can create protected sub-pages to restrict public access to some of your pages.